scholarly journals Impact of cyclic compressive loading and moisture content on the mechanical behavior of Aucoumea Klaineana Pierre

2017 ◽  
Vol 13 (4) ◽  
pp. 190-196 ◽  
Author(s):  
Claude Feldman Pambou Nziengui ◽  
Samuel Ikogou ◽  
Rostand Moutou Pitti
Keyword(s):  
Moisture Content ◽  
Mechanical Behavior ◽  
Compressive Loading ◽  
Aucoumea Klaineana

scholarly journals Influence of machining damage generated during trimming of CFRP composite on the compressive strength

2019 ◽  
Vol 54 (11) ◽  
pp. 1413-1430 ◽  
Author(s):  
N Nguyen-Dinh ◽  
C Bouvet ◽  
R Zitoune
Keyword(s):  
Surface Roughness ◽  
Mechanical Behavior ◽  
Composite Structures ◽  
Compressive Loading ◽  
Machined Surface ◽  
Reinforced Plastic ◽  
Cfrp Composite ◽  
Optical Topography ◽  
Induced Defects ◽  
Machining Damage

Machining of composite materials is a challenging task due to the heterogeneity and anisotropy of composite structures. The induced defects reduce integrity of the machined surface as well as the loading capacity of the composite structure in service. Therefore, it is necessary to quantify the damage induced during trimming and correlate the quality of the machined surface to mechanical properties. The correlation of the surface roughness criteria, widely used in literature, to the mechanical behavior raise several contradictions. For this reason, new parameters for the characterization of the machined surface are proposed and correlated to the mechanical behavior under compressive loading. In this context, carbon fiber-reinforced plastic laminates are conventionally trimmed, and the machining damage is characterized using scanning electron microscope observations, X-ray tomography, and 3D optical topography. The results reveal that crater volume and maximum depth of damage quantify the machining damage more realistic compared to the classical surface roughness criteria.

Mechanical Behavior of Fired-Clay Bricks from Stream Sediments under Uniaxial Compressive Loading

2016 ◽  
Vol 690 ◽  
pp. 252-258 ◽  
Author(s):  
Kritika Trakoolngam ◽  
Sarunya Promkotra
Keyword(s):  
Mechanical Behavior ◽  
Production Process ◽  
Preliminary Investigation ◽  
Compressive Loading ◽  
Chemical Properties ◽  
Stream Sediments ◽  
Raw Material ◽  
Average Weight ◽  
Clay Bricks ◽  
Technical Study

In the northeast of Thailand, raw material for fired-clay brick is obtained from fine stream sediments in the lower Nam Phong and upper Chi River sub-watersheds. Hundreds of brickyards exist along the waterway producing rice husk ash (RHA) bricks for construction. Technical study on the production of these bricks is limited, therefore, detailed studies on mechanical and chemical properties will enhance the understanding of the production process in order for further improvement. In this study, a preliminary investigation of the brickyards and production process was conducted. Brick samples as well as raw sediment materials were collected from 6 randomly selected locations for laboratory testing on physical, chemical, and mechanical properties. A total of 300 brick specimens were collected being 50 specimens from each location. The brick dimensions are roughly 5×5×15 cm with an average weight of about 680 g. X-Ray Diffractometry show that the fired brick composition is approximately 90-98% quartz, 5-7% clay minerals, and less than 1% minor minerals. Mechanical behavior of the fired-clay bricks was evaluated by compressive loading of single brick units conducted under dry and submerged (with reverse osmosis water) conditions. The compressive strength of the brick unit is found to be proportional to its density with values in the range of about 0.4-1.2 MPa. Bricks with RHA to sediment ratio of 1:3 exhibit a higher average strength that that of other ratios.

Sign in / Sign up

Export Citation Format

Share Document